Furcembolus martensi Xin, Jiang, Yao, and Li 2021
- Dataset
- Three new species of the extinct spider genus Furcembolus (Araneae: Pacullidae) from Late Cretaceous Burmese amber
- Rank
- SPECIES
- Published in
- Xin, Yafei, Jiang, Tongyao, Yao, Zhiyuan, Li, Shuqiang (2021): Three new species of the extinct spider genus Furcembolus (Araneae: Pacullidae) from Late Cretaceous Burmese amber. Zootaxa 4984 (1): 258-273, DOI: 10.11646/zootaxa.4984.1.19
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Arachnida
- order
- Araneae
- family
- Eopsilodercidae
- genus
- Furcembolus
- species
- Furcembolus martensi
description
Description. Male (holotype): Total length 3.54, carapace 1.56 long, 0.85 wide, opisthosoma 1.98 long, 1.28 wide. Left palp: 1.36 (0.59 + 0.21 + 0.56), left leg I: 9.66 (2.69 + 0.41 + 3.22 + 2.53 + 0.81), leg II: 6.30 (1.68 + 0.42 + 1.80 + 1.71 + 0.69), leg III: 4.61 (1.25 + 0.45 + 1.04 + 1.38 + 0.49), leg IV: 5.52 (1.52 + 0.31 + 1.64 + 1.41 + 0.64); right palp: 1.26 (0.70 + 0.17 + 0.39), right leg I: 9.63 (2.84 + 0.45 + 2.97 + 2.53 + 0.84), leg II: 6.56 (1.87 + 0.45 + 1.88 + 1.68 + 0.68), leg III: – (– + – + – + 1.05 + 0.55), leg IV: – (1.86 + 0.32 + 1.62 + – + –). Eyes: diameter ALE 0.04, diameter AME 0.13, diameter PLE 0.05, distance ALE-PLE not visible, distance AME-AME 0.08. Habitus as in Figs 8 D – E. Colour in amber: body and legs dark brown. Prosoma (Figs 8 A – B, D – E): carapace finely granulated, margin distinctly serrated, cephalic part of carapace clearly highest in its posterior portion; six eyes (Fig. 8 B) almost ovoid, AME> PLE> ALE; clypeus vertical anteriorly; chelicerae with two tiny teeth, anterior surface not visible; labium triangular, distally obtuse; sternum (Fig. 8 A) rough, marginally rugose. Leg slender, with distinctly serrate setae. Opisthosoma (Figs 8 D – E): oval with 4 or 5 sclerotized lateral plates, smooth, modified by tiny pits, covered with thin setae; ventral scutum rugose. Lateral scutum I reaches the half of margin of pulmonary plate. Spinnerets not visible. Palp (Figs 7, 11 B): femur approximately 3 times longer than patella, curved and rugose at middle part of ventral surface; patella short; tibia swollen, approximately 5 times as wide as femur, without apophysis; cymbium small and compressed; bulb long, proximal slightly swollen; embolus originates from the apex of oval palpal bulb, bending outwards in the middle and inwards on the distal part; embolus with a flat apophysis.
description
Figs 3, 7 – 8, 11 B
diagnosis
Diagnosis. The embolus apophysis of this species is similar to Furcembolus longior (see Wunderlich 2017: 131, figs 80 – 81, photo 62), but can be distinguished by palpal tibia without apophysis and egg-shaped in lateral view, by the length of the embolus, by the shape of embolus, and the shape of carapace (Figs 7, 11 B). The embolus of F. longior has a triangular apophysis near its tip. Both cephalic region and the lateral of thoracic region of F. martensi spec. nov. are raised, while only the cephalic region of F. longior is raised.
etymology
Etymology. The specific name is dedicated to Prof. Dr. Jochen Martens; noun (name) in genitive case.
materials_examined
Type material. MYANMAR: Kachin State: Holotype: male (IZCAS-Ar 42321 Fo), Late Cretaceous amber from Hukawng Valley. No biotic syninclusions. Material studied for comparison. F. longior (Fig. 11 A, SEABRI-Ar 003), Late Cretaceous amber from Hukawng Valley. No biotic syninclusions.